| phylogeny and evolution of the auks (subfamily alcinae) based on mitochondrial dna sequences. | the genetic divergence and phylogeny of the auks was assessed by mitochondrial dna sequence comparisons in a study using 19 of the 22 auk species and two outgroup representatives. we compared more than 500 nucleotides from each of two mitochondrial genes encoding 12s rrna and the nadh dehydrogenase subunit 6. divergence times were estimated from transversional substitutions. the dovekie (alle alle) is related to the razorbill (alca torda) and the murres (uria spp). furthermore, the xantus's murr ... | 1994 | 8058734 |
| temporal trends of perfluoroalkyl substances (pfas) in eggs of coastal and offshore birds: increasing pfas levels associated with offshore bird species breeding on the pacific coast of canada and wintering near asia. | perfluoroalkyl substances (pfas) such as perfluoroalkyl carboxylates (pfcas) and perfluoroalkyl sulfonates (pfsas) have become virtually ubiquitous throughout the environment, and, based on laboratory studies, have known toxicological consequences. various national and international voluntary phase-outs and restrictions on these compounds have been implemented over the last 10 to 15 years. in the present study, we examine trends (1990/1991-2010/2011) in aquatic birds (ancient murrelet, synthlibo ... | 2015 | 25989421 |
| spatial and temporal trends in brominated flame retardants in seabirds from the pacific coast of canada. | polybrominated diphenyl ethers (pbdes) and hexabromocyclododecane (hbcdd) are bioaccumulative flame retardants. pbdes increased in many ecosystems during the late 20th century, but recently have declined in some environments. to examine trends in the northern pacific, we analysed pbdes, hbcdd and carbon and nitrogen stable isotopes (δ13c and δ15n) to account for dietary effects in archived eggs of three seabird species from british columbia, canada, 1990-2011 (rhinoceros auklets, cerorhinca mono ... | 2014 | 25194271 |
| plastic ingestion in marine-associated bird species from the eastern north pacific. | in addition to monitoring trends in plastic pollution, multi-species surveys are needed to fully understand the pervasiveness of plastic ingestion. we examined the stomach contents of 20 bird species collected from the coastal waters of the eastern north pacific, a region known to have high levels of plastic pollution. we observed no evidence of plastic ingestion in rhinoceros auklet, marbled murrelet, ancient murrelet or pigeon guillemot, and low levels in common murre (2.7% incidence rate). sm ... | 2013 | 23683586 |
| complete mitochondrial genome of the south polar skua stercorarius maccormicki (charadriiformes, stercorariidae) in antarctica. | the south polar skua, gull-like seabirds is the most fascinating antarctic seabirds that lay two eggs at sites free of snow and ice and predominantly hunt pelagic fish and penguins. blood samples of the south polar skua stercorarius maccormicki was collected during the summer activity near king sejong station in antarctica. the complete mitochondrial dna sequence of s. maccormicki was 16,669 bp, showing conserved genome structure and orientation found in other avian species. the control region o ... | 2016 | 25268998 |
| post-breeding movements of ancient murrelet synthliboramphus antiquus family groups, subsequent migration of adults and implications for management. | increased shipping in british columbia (bc) waters poses risks for marine birds from marine oil spills. ancient murrelets (synthliboramphus antiquus), small marine diving birds of which half of the world's population breeds in bc, are especially susceptible to oiling immediately after departing from their breeding colonies, as their offspring are flightless, constraining their parents to remain with them. in 2014 we deployed geolocator loggers on ancient murrelets at four breeding colonies, two ... | 2017 | 28235033 |
| high corticosterone, not high energy cost, correlates with reproductive success in the burrow-nesting ancient murrelet. | theory and observations suggest that offspring abandonment in animals may occur when the costs to future reproductive output of current reproductive effort outweigh the fitness benefits of rearing the current brood. while hormonal cues (i.e. corticosterone) or energy reserves are believed to be involved, few studies have directly focused on the proximate cues influencing behaviours directly related to reproductive success. to address this information gap, we determined the incubation metabolic r ... | 2013 | 24391929 |
| incubation patterns in a central-place forager affect lifetime reproductive success: scaling of patterns from a foraging bout to a lifetime. | long-lived seabirds face a conflict between current and lifelong reproductive success. during incubation shifts, egg neglect is sometimes necessary to avoid starvation, but may compromise the current reproductive attempt. however, factors underlying this decision process are poorly understood. we focus on the ancient murrelet, synthliboramphus antiquus, an alcid with exceptionally long incubation shift lengths, and test the impact of environmental factors on incubation shift length in relation t ... | 2011 | 21423631 |
| heavy metal distribution in some wild birds from korea. | this study presents concentrations of heavy metals (manganese, zinc, lead, and cadmium) in tissues in six orders of korean wild birds (n=37), 2000-2002. zinc, manganese, lead, and cadmium concentrations in all tissues were highest in ancient murrelets (synthliboramphus antiquus). essential elements in korean wild birds were within the normal range for wild birds and are maintained there by a normal homeostatic mechanism. lead concentrations in livers of almost all birds were within the backgroun ... | 2009 | 18574544 |
| influence of overwinter distribution on exposure to persistent organic pollutants (pops) in seabirds, ancient murrelets (synthliboramphus antiquus), breeding on the pacific coast of canada. | assessing the fate of both legacy and newer persistent organic pollutants (pops) is an ongoing challenge. top predators, including seabirds, are effective monitors of pops because they forage over a range of marine habitats, integrating signals over space and time. however, migration patterns can make unravelling contaminant sources, and potentially assessments of the effectiveness of regulations, challenging if chemicals are acquired at distant sites. in 2014, we fitted geolocators on ancient m ... | 2020 | 31926389 |